If you've been on a searchdo committees actually download materials from interfolio on the actual deadline? Asking because I may have re-uploaded a document in an application due a few days agowondering what the chances are that they'll be looking at the old version.

If it's an electronic submission, then odds are the search committee is using something like Google Drive. We're academics. We don't usually get to applicant materials until we have a few spare moments and have nothing more pressing to tend to, so I'd not worry about this. We can also usually figure things out when an applicant uploads more than one document.

Having been on two search committees (not to mention there being a ton of other hires in my dept when I was not on the committee), I agree that few people are going to look at the materials until the due date. In fact, most of the applicants' materials tend to come in the night before/day of (and even day afetr) the due date, so many committee members feel there's little point to really looking at the materials until the due date has come and gone.

I also agree that I think you can safely assume most of the committee will rely on looking at soft copies online rather than say printing out a copy of your materials the first time you submitted them. So, when they go to do this, they'll likely be seeing your latest uploaded copy. The software we use for job materials at my university (and the same package is used at plenty of others) shows the date when the materials were submitted, for what that's worth.

I would only add that for many search committee members, the first thing they'll look at is not necessarily even people's actual materials but rather a spread sheet that summarizes what we have from/for the person. It might include the name, institution, advisor's name, whether the person did a postdoc, where, and with whom, the number of pubs the person has, any grant info, and finally the number of letters that have come in. (These are usually the last part of a package to finally all be in). In my experience, such a summary file might be sent out to the committee members within a week of the deadline.

I agree with that too. These spreadsheets are often number heavy which means after that people will go right for the packages of the people with the best numbers (pubs, funding) and demographics (school, pedigree) and maybe not even look at some of the applications in detail.